TesselManiac! 0.9b for Mac can be downloaded from our website for free. The actual developer of this Mac application is Kevin Lee. The program relates to Design & Photo Tools.
From the developer:
TesselManiac! is a free-to-use program for creating Escher-like tessellations. A subset of the The Flipping Tile Game is included, which is a new way to learn about the four isometries of the plane; translation, rotation, reflection, and glide-reflection.
You may want to check out more Mac applications, such as TkMatMan, 3D Invigorator PS or Microspot Interiors Pro, which might be similar to TesselManiac!.